I used the same ARB Twin Air compressor on my JK for a couple of years, a total of a dozen or so outings requiring air up/down my 37" tires and usually helping others. I never had any problems with that compressor and it was way faster than any other I had tried. I installed it using the AFE "Glide Guard" mount that puts it in the space that the huge stock muffler usually occupies. Yes, this required an aftermarket exhaust like the AFE systems. I had this run to a fitting at the rear only and no tank so there wasn't much plumbing to go wrong. My JK was a Rubicon with the electric lockers so I didn't need a tank for that but without one I couldn't run air tools.
Now on my XJ I am running a 10# (the # stands for pounds for the younger folks) Powertank and love it! There is no plumbing necessary for the tank itself and I mounted it in place of the "mini" spare tire in the cargo area.On the XJ I have an air actuated front locker and I was hesitant to plumb my main tank to that in case I tore a line off, I didn't want to have my tank empty itself before I was able to shut it off. My solution was to add one of Powertank's 20 oz. Power Shot bottles to run the locker. These bottles are small enough that they easily fit in the seat back pocket of my Mastercraft seats, no wiring (except for the solenoid) and simple push-in fittings on 1/4" line. I did protect the line that runs down my control arm by sliding it through some vinyl tubing. With both the 10# and 20 oz. bottles I'm into the package for about what I would have paid for another Twin Air and installation but have a more reliable system.The Powertank is much faster than a compressor and allows the use of air tools, at the sacrifice of airing up a few tires per tank refill.